Shock-absorbing device for motor-cycles.



J. BABIS, Jn.

SHOCK ABSORBING DEVICE FOR MOTOR CYCLES.

APPLICATION FILED ocr, 13. |914.

1,168,702. I Patented Jan.18,1916.

WITNESSES INVENTOR THB GOLUMBIA PLANDURAPH SU.. WASHINGTON, D E.

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yJOHN Bains, an., 0FJe'rrutannLPHIA7 PENNSYLVANIA.

SHOCK-ABSORBING DEVICE FOR MOTOR-CYCLES.

To all whom t may concern:

Be it known that I, l.Ions Bains, Jr., a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Shock-Absorbing Devices for Motor-Cycles, of which the following is a specification.

The object of my invention 'is to provide the frame of a motor cycle with an eimlective form of shock absorbing device which will serve to lessen the force of the shock upon the springs which usually constitute thel sole means for this purpose. This object I attain in the manner hereinafter set forth, reference being had to the accompanying drawing, in which- Figure 1 is a side elevation of a portion of the rear wheel and rear frame of a motor cycle showing the position of my improved shock absorber in respect to the rear frame and the usual shock absorbing spring, Fig. 2 is a rear elevation of the same, partly in section, and Fig. 3 is an enlarged sectional view of one of the side members of the rear fork illustrating the application of my improved shock absorber thereto.

In Fig. 1 of the drawing, 1 represents part of the rear wheel of a motor cycle and 2 a longitudinal strut such as is employed at each side of the rear wheel and extending from the gear case 3 to a plate 4, to which the end of the rear axle is secured, 5 representing the hub of the rear wheel which has at one side a sprocket wheel 6 for receiving the driving chain which I have not considered it necessary to illustrate in the drawing, as it forms no essential part of my inven tion.

Extending rearwardly from the mid frame 7 of the motor cycle is a leaf spring 8 which extends rearwardly beyond the rear fork 9 of the frame and is then curved forwardly for connection with a bolt 1G passing through a U-shaped member 11, one of which is secured to each side of the rear fork 9 so that upward thrust upon said U-shaped member 11 is exerted upon the forwardly bent end of the spring 8 and is thus caused to be transmitted through said spring 8 to the mid frame -7 upon which the saddle 1s mounted.4 The upper portion of each spring bears upon a rubber tube 12 surrounding a transverse bolt 13 at the top of the U-shaped member, and a rubberbuffer 14 is interposed between said upper portion of the spring and the forwardly bent rear end of the same.

Specification of Letters Patent.

Patented aan. is, 191e.

Application filed Getober 13, 1914. Serial No. 866,433;

Secured to each of the axle supporting plates 4 is the forked lower end 15 of a rod usual, secured directly to the lower end of the U-shaped member 11 of the rear fork of the frame so that shocks are imparted di-` rectly to the latter and thence to the forwardly bent rear end Of the spring fracture of the bent portion of the same frequently results. i In order to overcome thisobjection I disconnect the rod 16 from the U shaped member 11 and provide said rod 16 at its upper end with a. piston 17 free to move up and down in a cylinder 18, whose upper end is secured to the lower end of the U-shaped member 11 and whose lower end is provided with a removable cap 19 having a central opening for the passage of the rod 16, as shown in Fig. 3.

Between the piston 17 and the top of the cylinder 18 is interposed a coiled springy 2O and between said piston 17 and the cap 19 is interposed a similar coiled spring 21. Because of this construction shocks or jars imparted to the axle of the rear wheel arek Ushaped member or the forwardly bent rear end of the spring 8, the consequence being that by the time the shock reaches the end of the spring it will have been eased to such an extent as to prevent any likelihood of fracture of the spring thereby. In like manner sudden downward movements of the piston 17 are checked by the lower spring 21 and easy riding is thereby insured.

My invention may also, if desired, be used in connection with the shock absorbing spring usually employed in connection with that portion of the frame which carries the front wheel.

I claim:

1. The combination of the axle of a. motor cycle wheel, a leaf spring having a free end, and a member inserted between the axle and said free end of the leaf spring, said member having as elements a rod moving with the axle, means for guiding said rod, a spring interposing an elastic resistance to upward movements of the rod, and means whereby upward thrust of said spring 1s transmitted to the free end of the leaf spring.

2. The combination of the axle of a motor cycle wheel,k a baekwrdly extending leali` spring having e, forwardly projecting free end, and a shock' absorbing-'member"having as elements e stop for Contacting with the back of the rearwardlytextendngmm'portion- .of the leafspring, :trod moving with theaXle; men'sforguldmg said rd,` e" spring lnterposmg a yielding resistance'to upward movements of said rod, and means whereby upward thrust of 'said sprngfs transmitted to the free' end v4ofthe leef spring.

3. The Vcombinationoi the axleoffa motor cyol'e'wli'eel, aleaff springhavinglzt freeend,v and a member inserted between the axleancl saicl'free enel of the leaf spring, said memberA havingas elements a frodmovng with the axle, means for guiding said rod, upper and lower' sprlngs, the former` nterposing an 'elastic `resistance vto Vupward movements of In testimony wher-e015,V IV havelsigned-my'' name tok this specification, the'presenee of two subscribing witnesses.

, Y ,IHBA-Bsh;

v Witnesses: r. Y

KATE A. BEADLE; ,l

Copies of-fthisepatent mayfbe obtainedV for ve cents. each, by addressing the 50omnpssiolvler-`1afetentsL WashingtomrDfC. 

